linux-kernel - Re: [PATCH] audit: Make audit_filter_syscall() return void

Open Source and information security mailing list archives

Date:   Tue, 26 Jan 2021 14:04:18 -0500
From:   Richard Guy Briggs <rgb@...hat.com>
To:     menglong8.dong@...il.com
Cc:     paul@...l-moore.com, Yang Yang <yang.yang29@....com.cn>,
        linux-audit@...hat.com, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] audit: Make audit_filter_syscall() return void

On 2021-01-26 05:11, menglong8.dong@...il.com wrote:
> From: Yang Yang <yang.yang29@....com.cn>
> 
> No invoker users the return value of audit_filter_syscall().
> So make it return void.

That was my oversight when ripping out the AUDIT_FILTER_ENTRY list:
5260ecc2e048 <rgb@...hat.com> 2018-02-14 ("audit: deprecate the AUDIT_FILTER_ENTRY filter")

Might as well also amend the function comment block to remove the
reference to syscall entry since that is no longer relevant.

> Signed-off-by: Yang Yang <yang.yang29@....com.cn>

Reviewed-by: Richard Guy Briggs <rgb@...hat.com>

> ---
>  kernel/auditsc.c | 8 ++++----
>  1 file changed, 4 insertions(+), 4 deletions(-)
> 
> diff --git a/kernel/auditsc.c b/kernel/auditsc.c
> index ce8c9e2279ba..c8e16b9c0f21 100644
> --- a/kernel/auditsc.c
> +++ b/kernel/auditsc.c
> @@ -804,7 +804,7 @@ static int audit_in_mask(const struct audit_krule *rule, unsigned long val)
>   * also not high enough that we already know we have to write an audit
>   * record (i.e., the state is AUDIT_SETUP_CONTEXT or AUDIT_BUILD_CONTEXT).
>   */
> -static enum audit_state audit_filter_syscall(struct task_struct *tsk,
> +static void audit_filter_syscall(struct task_struct *tsk,
>  					     struct audit_context *ctx,
>  					     struct list_head *list)
>  {
> @@ -812,7 +812,7 @@ static enum audit_state audit_filter_syscall(struct task_struct *tsk,
>  	enum audit_state state;
>  
>  	if (auditd_test_task(tsk))
> -		return AUDIT_DISABLED;
> +		return;
>  
>  	rcu_read_lock();
>  	list_for_each_entry_rcu(e, list, list) {
> @@ -821,11 +821,11 @@ static enum audit_state audit_filter_syscall(struct task_struct *tsk,
>  				       &state, false)) {
>  			rcu_read_unlock();
>  			ctx->current_state = state;
> -			return state;
> +			return;
>  		}
>  	}
>  	rcu_read_unlock();
> -	return AUDIT_BUILD_CONTEXT;
> +	return;
>  }
>  
>  /*
> -- 
> 2.25.1
> 
> --
> Linux-audit mailing list
> Linux-audit@...hat.com
> https://www.redhat.com/mailman/listinfo/linux-audit

- RGB

--
Richard Guy Briggs <rgb@...hat.com>
Sr. S/W Engineer, Kernel Security, Base Operating Systems
Remote, Ottawa, Red Hat Canada
IRC: rgb, SunRaycer
Voice: +1.647.777.2635, Internal: (81) 32635

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